* [PATCH] arm: mach-msm: fix error handling in msm_iommu_probe()
@ 2010-10-17 14:51 Vasiliy Kulikov
2010-10-18 19:32 ` Stepan Moskovchenko
0 siblings, 1 reply; 2+ messages in thread
From: Vasiliy Kulikov @ 2010-10-17 14:51 UTC (permalink / raw)
To: linux-arm-kernel
msm_iommu_probe() didn't free mem_region and mapped IO.
Also if request_mem_region() failed then error handling
code dereferenced NULL pointer.
Signed-off-by: Vasiliy Kulikov <segooon@gmail.com>
---
arch/arm/mach-msm/iommu_dev.c | 22 +++++++++++++---------
1 files changed, 13 insertions(+), 9 deletions(-)
diff --git a/arch/arm/mach-msm/iommu_dev.c b/arch/arm/mach-msm/iommu_dev.c
index c33ae78..9019cee 100644
--- a/arch/arm/mach-msm/iommu_dev.c
+++ b/arch/arm/mach-msm/iommu_dev.c
@@ -128,7 +128,7 @@ static void msm_iommu_reset(void __iomem *base)
static int msm_iommu_probe(struct platform_device *pdev)
{
- struct resource *r;
+ struct resource *r, *r2;
struct clk *iommu_clk;
struct msm_iommu_drvdata *drvdata;
struct msm_iommu_dev *iommu_dev = pdev->dev.platform_data;
@@ -183,27 +183,27 @@ static int msm_iommu_probe(struct platform_device *pdev)
len = r->end - r->start + 1;
- r = request_mem_region(r->start, len, r->name);
- if (!r) {
+ r2 = request_mem_region(r->start, len, r->name);
+ if (!r2) {
pr_err("Could not request memory region: "
"start=%p, len=%d\n", (void *) r->start, len);
ret = -EBUSY;
goto fail;
}
- regs_base = ioremap(r->start, len);
+ regs_base = ioremap(r2->start, len);
if (!regs_base) {
pr_err("Could not ioremap: start=%p, len=%d\n",
- (void *) r->start, len);
+ (void *) r2->start, len);
ret = -EBUSY;
- goto fail;
+ goto fail_mem;
}
irq = platform_get_irq_byname(pdev, "secure_irq");
if (irq < 0) {
ret = -ENODEV;
- goto fail;
+ goto fail_io;
}
mb();
@@ -211,14 +211,14 @@ static int msm_iommu_probe(struct platform_device *pdev)
if (GET_IDR(regs_base) == 0) {
pr_err("Invalid IDR value detected\n");
ret = -ENODEV;
- goto fail;
+ goto fail_io;
}
ret = request_irq(irq, msm_iommu_fault_handler, 0,
"msm_iommu_secure_irpt_handler", drvdata);
if (ret) {
pr_err("Request IRQ %d failed with ret=%d\n", irq, ret);
- goto fail;
+ goto fail_io;
}
msm_iommu_reset(regs_base);
@@ -237,6 +237,10 @@ static int msm_iommu_probe(struct platform_device *pdev)
return 0;
+fail_io:
+ iounmap(regs_base);
+fail_mem:
+ release_mem_region(r->start, len);
fail:
kfree(drvdata);
return ret;
--
1.7.0.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH] arm: mach-msm: fix error handling in msm_iommu_probe()
2010-10-17 14:51 [PATCH] arm: mach-msm: fix error handling in msm_iommu_probe() Vasiliy Kulikov
@ 2010-10-18 19:32 ` Stepan Moskovchenko
0 siblings, 0 replies; 2+ messages in thread
From: Stepan Moskovchenko @ 2010-10-18 19:32 UTC (permalink / raw)
To: linux-arm-kernel
On 10/17/2010 7:51 AM, Vasiliy Kulikov wrote:
> msm_iommu_probe() didn't free mem_region and mapped IO.
> Also if request_mem_region() failed then error handling
> code dereferenced NULL pointer.
>
> Signed-off-by: Vasiliy Kulikov<segooon@gmail.com>
> ---
> arch/arm/mach-msm/iommu_dev.c | 22 +++++++++++++---------
> 1 files changed, 13 insertions(+), 9 deletions(-)
>
> diff --git a/arch/arm/mach-msm/iommu_dev.c b/arch/arm/mach-msm/iommu_dev.c
> index c33ae78..9019cee 100644
> --- a/arch/arm/mach-msm/iommu_dev.c
> +++ b/arch/arm/mach-msm/iommu_dev.c
> @@ -128,7 +128,7 @@ static void msm_iommu_reset(void __iomem *base)
>
> static int msm_iommu_probe(struct platform_device *pdev)
> {
> - struct resource *r;
> + struct resource *r, *r2;
> struct clk *iommu_clk;
> struct msm_iommu_drvdata *drvdata;
> struct msm_iommu_dev *iommu_dev = pdev->dev.platform_data;
> @@ -183,27 +183,27 @@ static int msm_iommu_probe(struct platform_device *pdev)
>
> len = r->end - r->start + 1;
>
> - r = request_mem_region(r->start, len, r->name);
> - if (!r) {
> + r2 = request_mem_region(r->start, len, r->name);
> + if (!r2) {
> pr_err("Could not request memory region: "
> "start=%p, len=%d\n", (void *) r->start, len);
> ret = -EBUSY;
> goto fail;
> }
>
> - regs_base = ioremap(r->start, len);
> + regs_base = ioremap(r2->start, len);
>
> if (!regs_base) {
> pr_err("Could not ioremap: start=%p, len=%d\n",
> - (void *) r->start, len);
> + (void *) r2->start, len);
> ret = -EBUSY;
> - goto fail;
> + goto fail_mem;
> }
>
> irq = platform_get_irq_byname(pdev, "secure_irq");
> if (irq< 0) {
> ret = -ENODEV;
> - goto fail;
> + goto fail_io;
> }
>
> mb();
> @@ -211,14 +211,14 @@ static int msm_iommu_probe(struct platform_device *pdev)
> if (GET_IDR(regs_base) == 0) {
> pr_err("Invalid IDR value detected\n");
> ret = -ENODEV;
> - goto fail;
> + goto fail_io;
> }
>
> ret = request_irq(irq, msm_iommu_fault_handler, 0,
> "msm_iommu_secure_irpt_handler", drvdata);
> if (ret) {
> pr_err("Request IRQ %d failed with ret=%d\n", irq, ret);
> - goto fail;
> + goto fail_io;
> }
>
> msm_iommu_reset(regs_base);
> @@ -237,6 +237,10 @@ static int msm_iommu_probe(struct platform_device *pdev)
>
> return 0;
>
> +fail_io:
> + iounmap(regs_base);
> +fail_mem:
> + release_mem_region(r->start, len);
> fail:
> kfree(drvdata);
> return ret;
Tested on hardware. Looks good. Thanks!
Acked-by: Stepan Moskovchenko <stepanm@codeaurora.org>
--
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
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